Not stated. Evidently named after the Azores archipelago where collected. [details]
Not stated, but H. capensis is evidently named after the Cape Provinces of South Africa. [details]
Zoologisches Museum Wien nr.2026 [details]
West to South African records partly should be referred to Hydroides capensis; from the azores to H. azoricus. [details]
shipwreck "Doria" east of Ponta Delgada port, île Sao Miguel, Açores (Azores), gazetteer estimate 37.7410° -25.6478° [details]